Fig. 3
From: Aloe-emodin induces apoptosis in human oral squamous cell carcinoma SCC15 cells
Aloe-emodin induces apoptosis of the SCC15 cells. SCC15 cells were treated by aloe-emodin of 0 μM (a and c) and 50 uM (b and d) for 24 h and 48 h, respectively. Annexin binding and propidium iodide (PI) staining were analyzed by FACScan. Q4: viable cells; Q3: early apoptotic cells; Q2: late apoptotic cells; Q1: death cells. The graph visualizes early and late stage apoptotic cells (e). Results were expressed as the mean ± SD (n = 3) and analyzed by Students’t-test (*P < 0.05, **P < 0.01)